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Ohms Law

PHY 100


Students investigate Ohms Law while comparing the electrical properties of a resistor and a light bulb.


Name Location Quantity
Bulbs, Miniature, Bayonet base JE-105A-S135 1 per table
Clips, Alligator JE-105A-S58 2 per table
Multimeter, Digital, Extech EX420 - Battery JE-105A-D103 1 per table
Wire, Banana Patch Cords, Hookup Leads JE-Lab Rooms-ByChalkboard 2 per table
Power Supply, Extech (Model #382213) JE-105A-X12/13 1 per table
Ruler, Transparent, Flexible JE-105A-D90 3 per table
Wire, Nichrome, Nickel Cromium, 22GA JE-105A-S65 1 per room
150 Ohm Resistor JE-105A-S135 1 per table


One Extech power supply with dial limit set to 1/3rd, around 180mA, and voltage turned all the way down.

One red and black patch cord connected to power supply. One 150 ohm resistor with alligator or Fahrenstock clips on both ends.

Bayonet basebulb in holder.

Multimeter as Ammeter with 20A fuse connected to power supply, in series with 150ohm resistor.

2-foot piece of nichrome wire

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Item modified on 2019-03-18 13:38:31 by damicoa6.